Data transfer in wireless networks is very slow

The wireless card display is working, but the data transfer is very slow, what is the reason?

The reason for the slow wireless data transfer is that the wireless signal is too weak. Some homes or offices use steel frame structures, and the steel bars in such buildings may interfere with wireless signals in the network, resulting in lower rates of data transfer. You can try to move your computer to another location to see if the network signal is improving. Or use wireless antenna to gain the wireless signal.